Malcolm anderson



Patented Feb.

LIFTmG JAGK AN DREW B GRAHAM. PHOT0UTMU.WASMINGTUN. ILC

M. ANDERSON.'

(No Model.)

ma. E S m W Nirnn STATES MALCOLM ANDERSON,

ATnNT' OFFICE.

OF NEW YORK, N. Y.

LIFTING-JACK.-

SPECIFICATION forming part of Letters Patent No. 554,612, dated February 11, 1896.

Application filed October 9, 1894.

.T0 all whom t may concern.-

Be it known that I, MALCOLM ANDERSON, of New York city, in the county and State of New York, have invented new and useful Improvements in Lifting-Jacks, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved lifting-jack, which is simple and durable in construction, very effective in operation, and arranged to transfer the load from the screw-spindle head to an auxiliary support and to shift the load laterally with the said support.

The invention consists of an auxiliary support adapted to be raised or lowered on the spindle or piston of the jack and iitted to slide laterally.

The invention further consists of an eccentric-plate mounted to rotate on the piston or the screw-spindle of a jack and carry the auxiliary support.

The invention also consists of certain parts and details and combinations of the same, as will be fully described hereinafter and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a sectional side elevation of the improvement on the line l l of Fig. 2. Fig. 2 is a plan view of the same. Fig. 3 is a plan view ofthe eccentric strap or ring. Fig. 4 is a sectional side elevation of the same on the line 4 4 of Fig. 3. Fig. 5 is a plan view of the eccentric disk and collar, and Fig. 6 is a sectional side elevation of the same on the line G 6 of Fig. 5.

The present example of my invention is shown as applied to a screw lifting-jack but it is to be understood that my invention is equally applicable to hydraulic lifting-jacks and other forms of lifting-jacks.

As herein shown, the lifting-jack is provided with the usual stand A, in which is fitted to move the screw-spindle B, on which turns the nut O, mounted to turn loosely on the upper end of the stand A. It is understood that when the device is arranged on a hydraulic lifting-jack the screw-spindle B and nut O, mounted to turn loosely on the upper end of the stand A, are superseded by Serial No. 525,329. (No model.)

the usual piston-rod, piston, and cylinder, respectively. In the lifting-jack the nut is held in place on the spindle by set-screws D, engaging an annular shoulder E formed on the upper end of the stand A. Thus the nut O can be turned on the upper end of the stand A to raise and lower the spindle B, the latter being prevented from turning by a key F held in the upper end of the stand A and engaginga lon gitudinally-extending keyway B formed in the spindle B.

On the upper end of the spindle B screws a nut G, adapted to engage the under side of a collar H, mounted to rotate loosely on the non-threaded end B2 of the spindle B. On the top of this collar H is formed an eccentric disk I, engaged at its periphery by the ring 0r strap J, resting at its under side on top of the collar H and held in place thereon by a plate K, secured to the top of the disk I and engaging an annular recess J formed in the ring J, as is plainly shown in Figs. l and 4. On top of this ring J is placed the load-support L, made in the shape of a ring similar to the ring J and carrying two oppositely-arranged bolts N, extending downward and passing into transversely-extending slots J2, formed in the ring J, as is plainly shown in Figs. l and 3. In the under side of the support L are also arranged transversely-extending guideways L', as shown in dotted lines in Fig. 2, extending parallel to the slots J2, the said guideways being engaged by guides J 3, formed on the top of the ring J. (See Figs. 3 and 4.)

On the upper reduced end B2 of the screwspindle Bis held by the screw B8 the head O, adapted to support the load during the time the upper surface of the support L is below the top surface of the head O. The latter is adapted to pass within the opening of the support L, as shown in Fig. l, when the nut G is screwed up to raise the collar H, eccentric disk I, ring J, and support L to transfer the load from the head O to the top surface of thesupport L.

The device is used as follows Normally the nut G is screwed down so that the top surface of the support L is below the top surface of the head O to permit the latter to engage the load on the upward movement of the spindle B. Now when the load is raised on IOO the head O of the screw-spindle B to the required height by turning the nut C in the usual manner, and it is desired to transfer the load from the head O and to shift it laterally, then the operator turns the nut G to screwr the latter upward on the spindle B, whereby the collar H, the eccentric disk I, the ring J, and the support L are moved upward on the end B2 of the spindle B, so that finally the head O passes within the opening of the support L, and the load is transferred to the top surface of the support L. The operator then turns the collar I-I by insertinga suitable tool in the recesses II formed in the said collar, so that the eccentric disk I revolves with the collar and imparts a shifting motion to the ring J, and consequently to the support L, which latter then slides transversely on the bolts N and the guides J i. Thus the load on the support L is shifted latera-lly.

The lateral motion given to the support L and its load can be regulated by previously adjusting the ring J, so that the slots J 2 and the guides J 3 stand in a direction at right angles to that in which the load is shifted.

Then the throwof the eccentric disk I has been exhausted, then the nut G is turned downward to lower the support L to again transfer the load to the head O, after which the eccentric is brought back to its startingpoint by turning it by hand, and then the nut G is again raised to transfer the load from the head O back to the support L, after which the collar II is again turned to cause the eccentric to shift the support L laterally, so as to give a second lateral motion to the load carried by the support L. This is repeated until the load has been shifted the desired distance.

IIaving thus fully described my invention, I claim as new and desire to secure by Letters Patentl. The combination with a lifting-jack having alload-supporting head, of an auxiliary load-support separate from the said head and adjustable relatively thereto on the jack to sustain the load raised by the jack, and means for moving the said support laterally, substantially as shown and described.

2. The combination with a lifting-jack, of an auxiliary support adj ustable vertically above the upper end of the jack, means for vertically adjusting the auxiliary support to sustain the load raised by the jack, and means for moving said support laterally after it has been adjusted, substantially as described.

.3. In a lifting-j ack, the combina-tion with a spindle or stem having a head on its upper end, of an auxiliary support, means for raising the said support to shift the load from the spindle-head to the auxiliary support, and means for moving said support laterally, substantially as shown and described.

Y 4. In a lifting-jack, the combination with a spindle or stem having a head at its upper end, of an auxiliary support through which the head of the spindle or stem is adapted to project, means for raising said support above the spindle-head, and means for shifting the said support laterally, substantially as shown and described.

5. A liftingjack, comprising a spindle adapted to be raised or lowered and provided with a head for supporting the load, an eccentric mounted loosely on the said spindle, means for revolving and raising or lowering the eccentric on the spindle and a support held on the said eccentric and adapted to be shifted laterally by the said eccentric, substantially as shown and described.

G. A lifting jack, comprising a spindle adapted to be raised or lowered and provided with a head for supporting the load, an eccentric mounted to revolve and to be raised and lowered on the said spindle, a support held on the said eccentric and adapted to be shifted laterally by the said eccentric, and a nut screwing on the said spindle to `raise and lower the said eccentric, as set forth.

7. In a lifting-jack, the combination with a spindle having a head at its upper end, of an eccentric mounted to turn on the upper end of the spindle, means for raising and lowering said eccentric, a ring surrounding the eccolitric, and an auxiliary support mounted to slide on the said ring, substantially as shown and described.

MALCOLM ANDERSON.

Vitnesses:

E. M. CLARK, F. W. HANAFORD. 

